Diaminosilane-functionalized on silicate-stabilised hydrotalcite (MA-HTSi-DA): As potential catalyst for nitro-aldol condensation

•First report on diaminosilane functionalized silicate-anion-intercalated hydrotalcite (HT).•The basicity increased by introducing diaminosilane on HT materials.•The resultant materials showed good conversion with formation of dehydrated product.•Catalyst yield excellent conversion for variety of aldehydes.

Diaminosilane was introduced into silicate-anion-intercalated hydrotalcite (HT-Si) using a post-synthesis method. The resulting functionalized materials possess surface basicity. The textural properties of the functionalized materials were systematically investigated through powder XRD, FTIR and MAS–NMR studies. The diamine-functionalized materials showed very good catalytic activity for the nitro-aldol condensation of benzaldehyde and nitromethane under solvent-free conditions. The materials showed comparable catalytic activity upon recycling.

Graphical abstractFirst time, diaminosilane was introduced into silicate-anion-intercalated hydrotalcite using post-synthesis method. The functionalised materials were systematically investigated through powder XRD, FT-IR and MAS–NMR studies. The materials showed very good catalytic activity on nitroaldol condensation of benzaldehyde and nitromethane.Figure optionsDownload full-size imageDownload high-quality image (176 K)Download as PowerPoint slide